Same here: Finished 4th world (and bonus level) twice, but no badge awarded :-(. Despite of this, i liked the colourful explosions all over the screen.
Hell lot of work to do to get one tiny badge - and even more shocking than the final sequence: Badge wasnt awarded at the end! *grrr*
Great game anyway.
 "Pixel 2"){kind=tracking}
 "Coinbox Hero"){kind=icon}